After copyinh a QmlMetaProperty the name field returns empty

void QmlEaseFollow::setTarget(const QmlMetaProperty &t)
{
Q_D(QmlEaseFollow);
qDebug() << "setting target" << t.name() ;
d->target = t;
qDebug() << "after setting target" << d->target.name() ;
}

In the piece of code above d->target.name() prints "", even if t.name() != ""